<div class="tooltip" style="opacity:0;"
  tooltip-animation-class="fade"
  uib-tooltip-classes
  ng-class="{ in: isOpen() }">
  <div class="tooltip-arrow"></div>
  <div class="tooltip-inner"
    uib-tooltip-template-transclude="contentExp()"
    tooltip-template-transclude-scope="originScope()"></div>
</div>
